Land Rover Discovery Series Ii 04my Owners Handbook Nas Rover

							Active Cornering Enhancement
140
Ac tiv e Co rn erin g En han ce me nt
ACTIVE CORNERING ENHANCEMENT*
CAUTION: If the warning light illuminates RED 
a system fault has occurred that may result in 
serious damage to vehicle components. Stop 
the vehicle and switch off the engine as soon as 
safety permits. Seek qualified assistance 
immediately.Active Cornering Enhancement (ACE) is a 
patented feature unique to Land Rover. The 
system is designed to eliminate vehicle body 
lean at low cornering speeds and reduce body 
lean at higher cornering speeds, while 
maintaining a soft, car-like suspension for 
straight line travelling. On uneven surfaces and 
rough tracks, the ACE system will adjust the 
suspension according to the vehicle speed and 
roughness of the surface to provide improved 
passenger comfort.
The ACE system automatically compensates in 
off-road conditions to provide maximum 
articulation and improved traction.
The system is entirely automatic in operation 
and cannot be influenced by the driver in any 
way. However, the functionality of the ACE 
warning light in the instrument panel is very 
important and drivers should be aware of the 
information overleaf.
H4422 
						

							Active Cornering Enhancement
141
Warning light 
The warning light illuminates RED 
when the starter switch is turned 
on (to position II). After two 
seconds, the RED illumination changes to 
AMBER and, after a further two seconds, the 
light extinguishes. This process is a system 
check that takes place every time the vehicle is 
used. Provided the ACE system is operating 
correctly, illumination will not occur at any 
other time. 
If illumination occurs while driving, a fault 
with the system is indicated, as follows:
•If the light shows RED (a flashing red light, 
which changes to constant illumination after 
two minutes, and is accompanied by a 
warning chime): 
This indicates a system fault that may result 
in serious damage to vehicle components 
and reduced ACE performance. You must 
stop the vehicle as soon as safety permits 
and switch off the engine. DO NOT 
CONTINUE DRIVING! Seek qualified 
assistance immediately. 
•If the light shows AMBER (constant 
illumination): 
This indicates a system fault that will result 
in reduced ACE performance, but will not 
leave the vehicle in a dangerous condition. 
You may continue driving, but reduce 
speed, take additional care, and consult a 
Land Rover retailer at the earliest 
opportunity. 
						

							Self-levelling Suspension
142
Se lf-le ve lling S usp en sionSELF-LEVELLING SUSPENSION*
When the engine is running, the self-levelling 
suspension system (SLS) operates 
automatically on the rear of the vehicle to 
maintain a level or efficient vehicle height 
regardless of vehicle load.
AUTOMATIC OPERATION
If the height of the vehicle is reduced by 
additional loading (passengers occupying the 
occasional rear seats or the attachment of a 
trailer, for example), the SLS system 
automatically increases air pressure to the 
springs to compensate for the additional weight 
or changed attitude of the vehicle. Similarly, if 
loads are removed and the vehicle height 
increases in consequence, the system will 
reduce air pressure to bring the vehicle back to 
a level attitude. 
Extended mode
Off-road, if the vehicle becomes grounded and 
traction control is induced, the SLS system 
automatically pumps more air to the rear 
springs to raise the body clear of the 
obstruction, thereby enabling the vehicle to be 
freed. This is known as Extended mode and 
will cause the off-road warning light to flash. 
Once forward motion is regained, the 
suspension height will automatically return to 
its previous setting and the warning light will 
extinguish.
MANUAL OPERATION
The SLS system can also be manually 
controlled to either:
•Raise the rear of the vehicle by 40 mm 
(approx.) to increase ground clearance and 
improve the departure angle for off-road 
driving. Note that this function operates 
ONLY below a speed of 18 mph (30 km/h) - 
above this speed, the vehicle will 
automatically return to its standard ride 
height.
•Lower the vehicle in order to ease loading, 
or to enable various heights of trailer hitch 
to be connected more easily. 
The SLS system will assume automatic 
control - adjusting the height of the vehicle 
10 seconds after a road speed of 3 mph 
(5 km/h) is reached, or immediately once a 
road speed of 7 mph (12 km/h) has been 
achieved. This feature can only be used in 
conjunction with the remote suspension 
control handset. Consult your Land Rover 
retailer for further information.
WARNING
DO NOT operate the SLS while driving on the 
road, or when the suspension has been 
manually lowered below standard ride height 
- any sudden or unexpected change to the 
vehicles height or attitude could cause an 
inexperienced driver to lose control, or 
disturb the load/weight distribution within the 
vehicle. 
DO NOT select off-road height while towing.  
						

							Self-levelling Suspension
143
To manually raise the suspension
With the engine running and all doors fully 
closed, press the facia-mounted off-road mode 
switch (see illustration). A single warning 
chime will sound, the off-road warning light on 
the instrument panel will commence flashing 
and the rear of the vehicle will start to rise. Once 
the pre-set off-road height has been reached, 
the warning light will stop flashing and 
illuminate constantly instead. Constant 
illumination will remain while the vehicle is 
operating at off-road height.
To return the vehicle to standard ride height, 
press the off-road mode switch a second time. 
Note that a single chime will sound and the 
warning light will flash while the rear 
suspension is lowered.
NOTE: If axle displacement is excessive, 
selection of the off-road height setting may be 
prohibited. In this case three warning chimes 
will sound. 
NOTE: If changes to or from off-road height are 
prohibited (e.g. door open) the chime will 
sound three times.To manually lower the suspension
To lower the suspension you will need a remote 
suspension control (handset) - see illustration.
With the vehicle stationary at standard ride 
height, and the starter switch turned to position 
‘II’, press and hold the ‘DOWN’ button to lower 
the vehicle. Release the button when the 
desired height has been reached. The SLS 
warning light on the instrument panel will flash 
and a warning chime will sound continually 
while the vehicle is lowering.
To return the vehicle to its standard ride height, 
press and hold the ‘UP’ button on the handset. 
Again the warning light flashes (and chime 
sounds) while the vehicle is rising. All 
suspension movement and warning light 
activity ceases once the vehicle has returned to 
standard ride height.
NOTE: The SLS system will not operate while a 
door is open.
NOTE: At high altitude the system will take 
significantly longer to raise the vehicle.
H4423H4424 
						

							Self-levelling Suspension
144
NOTE: If this feature is subjected to excessive 
use, the system will automatically disable to 
prevent components from overheating. The 
system has a cumulative total of three minutes 
operation at any one time. If this is exceeded 
the system will close down (partial operation 
will return after a few minutes).
Remote SLS handset
If your vehicle is equipped with SLS, the remote 
SLS handset is available as an 
accessory from a Land Rover retailer. 
Battery replacement is similar to the equivalent 
process for the handset key (see ‘REMOTE 
HANDSET BATTERY’, page 36). Battery 
specification is identical. WARNING LIGHTS
Off-road - AMBER
Illuminates briefly as a bulb and 
system check when the starter 
switch is turned to position ‘II’ and 
then extinguishes. 
If the off-road switch is pressed: 
The light flashes while the rear of the vehicle is 
either; rising to off-road height, or returning to 
standard ride height. The light then illuminates 
constantly while the suspension remains at 
off-road height.
In addition, the light will flash while Extended 
mode is induced.    
Sell-levelling suspension - AMBER
Illuminates briefly as a bulb and 
system check when the starter 
switch is turned to position ‘II’ and 
then extinguishes.
If the remote handset is operated: 
The light flashes continually while the rear of 
the vehicle is being lowered, or raised.
If the light illuminates constantly: 
A fault with the suspension is indicated. Seek 
qualified assistance as soon as possible.
While it is possible to continue driving the 
vehicle in this condition, this is not 
recommended as there is a considerable risk of 
causing further damage to the suspension. 
Preferably, the vehicle should be brought to a 
halt as soon as conditions allow. Further travel 
should be limited to reaching the nearest Land 
Rover retailer, or driving to a place of safety 
while awaiting recovery. In any event, speed 
must be restricted to a rate that will guarantee a 
smooth, and totally bump-free, ride at all times, 
ideally traversing only smooth, roads.
IMPORTANT INFORMATION
Note that the handset will operate 
effectively from inside the vehicle. It is 
therefore important to keep it out of reach 
of children at all times, and especially while 
towing. When operating the handset from 
inside the passenger compartment for the 
purpose of lowering the vehicle to attach a 
trailer, ensure that the underside of the 
vehicle has been checked for obstructions 
before lowering, and that a responsible 
adult has been posted outside the vehicle 
to supervise the lowering process. 
						

							Park Distance Control
145
Park Distance ControlUSING THE PARK DISTANCE CONTROL
WARNING
The park distance control is not infallible; it is 
for guidance only! The sensors may not be 
able to detect certain types of obstruction 
(narrow posts or small narrow objects, small 
objects close to the ground and some objects 
with dark, non-reflective surfaces, for 
example).
The parking system assists the driver when 
manoeuvring the vehicle into a parking space, 
or anywhere that there are obstacles that need 
to be avoided, warning the driver accordingly.
The vehicle is fitted with four ultrasonic sensors 
on its rear bumper.
The range of the two outer sensors is 
approximately 2ft (0.6 m); the two inner 
sensors have a range of approximately 6 ft 6 in. 
(2 m).
WARNING
Keep the sensors free from dirt, ice and snow. 
If deposits build up on the surface of the 
sensors, their performance may be impaired. 
When washing the vehicle, avoid aiming high 
pressure jets directly at the sensors from 
close range.Activating park distance control
The park distance control is automatically 
activated whenever reverse gear (‘R’) is 
engaged. When the starter switch is turned on, 
the indicator light in the switch illuminates and 
a short tone sounds after one second as 
confirmation.
Park distance control can also be manually 
selected by pressing the switch on the left-hand 
set of binnacle switches (the indicator light in 
the switch illuminates and a short tone sounds 
as confirmation). A second press of the switch 
de-activates the system.
If a long, high pitched tone sounds and the 
switch indicator light flashes when park 
distance control is activated, a fault in the 
system has been detected - contact your 
retailer for assistance.
Park distance control in operation
The distance from an obstruction is identified 
by an intermittent tone sounding. As the vehicle 
moves closer to an obstruction, the frequency 
of the tone increases proportionally.
When the distance between the sensor and the 
obstruction is less than approximately 1 ft 
(0,4 m), the tone becomes continuous.
H4525H4455 
						

							Towing
146
To wing
TOWING
The torque ranges of Land Rover engines allow 
maximum-weight loads to be pulled smoothly 
from standstill, and reduce gear changing on 
hills or rough terrain. The suspension is 
designed to cope with a heavy trailer load 
without upsetting the balance or feel of the 
vehicle. Details of gross maximum towed 
weights are listed on the following pages and in 
the General Data section (see ‘TOWING 
WEIGHTS’, page 246).
WARNING
To preserve the vehicles handling and 
stability, only fit towing accessories that have 
been designed and approved by Land Rover.
Ensure that the gross vehicle weight and 
maximum rear axle weight are not exceeded. 
Exceeding allowable vehicle and axle loads 
will increase the risk of tire and suspension 
failure, increase vehicle brake stopping 
distance, and adversely affect vehicle handling 
and stability, which may result in a crash or 
vehicle rollover.
It is the driver’s responsibility to ensure that the 
towing vehicle and trailer are loaded and 
balanced so that the combination is stable 
when in motion. When preparing your vehicle 
for towing, pay attention to any instructions 
provided by the trailer manufacturer as well as 
to the information that follows.
Balancing the combination
To ensure optimum stability, it is essential that 
the trailer adopts a level aspect. In other words, 
the trailer must be level with the ground, with 
the towing hitch and trailer drawbar set at the 
same height (note the illustration at the top of 
the page). This is particularly important when 
towing twin axle trailers! Adjust the height of 
the hitch point if necessary.
With the engine running, vehicles with 
self-levelling suspension will automatically 
compensate for additional weight when the 
towing electrical socket is utilised. The remote 
suspension control handset can be used to 
manually adjust suspension height. See 
‘MANUAL OPERATION’, page 142.
H4929 
						

							Towing
147
Trailer hitch
Your vehicle is equipped with a Class III trailer 
hitch receiver as standard equipment. When 
selecting a drawbar for the receiver, do not 
exceed a drop in height of 3 in (76 mm) or a 
hitch length of 8 in (203 mm) - both as 
measured from the connecting pin of the 
receiver.
An equalizing or other form of weight 
distributing hitch should NOT be used with your 
vehicle.
NOTE: Users of light trailers with loads not 
exceeding 5511 lb (2500 kg) and a tongue 
weight limited to 400 lb (180 kg), may opt for a 
drawbar with a drop height not exceeding 5 in 
(127 mm).
Towing guidelines
When preparing your vehicle for towing, pay 
careful attention to the trailer manufacturers 
recommendations and observe the following 
guidelines:
•Ensure that the towing vehicle tire pressures 
are correct and that the trailer tire pressures 
are as recommended by the trailer 
manufacturer.
•Within the limits quoted, choose a draw bar 
that allows for a level attitude of the trailer 
and vehicle.•Check the operation of trailer brakes and 
lights.
•For maximum stability, ensure that loads 
are properly secured and unable to shift 
position during transit. Also, position loads 
so that most of the weight is placed close to 
the floor and, where possible, immediately 
above or close to the trailer axle(s).
•After loading the trailer, check that the 
weight on the hitch point (this is called the 
tongue weight, or nose weight), is in 
accordance with both the trailer 
manufacturers recommendations, and the 
requirements in this Manual, (see ‘Tongue 
weight’, page 149).
•When calculating the laden weight of the 
trailer, remember to include the weight of 
the trailer PLUS THE LOAD.
•Where the load weight can be divided 
between trailer and tow vehicle, loading 
more weight into the vehicle will generally 
improve the stability of the combination. 
NOTE: It is the drivers responsibility to ensure 
that all regulations with regard to towing are 
complied with according to the state in which 
the vehicle is being operated. All relevant 
information should be obtained from an 
appropriate motoring organization or towing 
equipment retailer.
NOTE: When towing trailers, always consult 
and obey local speed regulations. Speed should 
be reduced to compensate for increased 
stopping distances.
H2651
8 inch ( 203 mm ) 
3 inch ( 76 mm )  
						

							Towing
148
Vehicle weights
When loading a vehicle to its maximum (GVW), 
take account of the load distribution to ensure 
that axle loads do not exceed the permitted 
maximum values. It is your responsibility to 
limit the vehicle load in such a way that neither 
the maximum axle loads nor the GVW are 
exceeded. The most accurate method of 
determining load distribution is by using a 
public weighbridge.
Tongue weight should be approximately 7% of 
the actual trailer laden weight to maintain 
optimum stability. Tongue weight can be 
measured using a proprietary brand of tongue 
weight indicator.
Automatic gearbox
To avoid overheating the gearbox, it is not 
advisable to tow heavy trailer loads at speeds of 
less than 20 mph (32 km/h) using the main 
gearbox in high range. Use the transfer gearbox 
to select low range instead.Towing on severe inclines 
If a journey includes severe inclines and the 
Gross Train Weight (the maximum permissible 
weight of vehicle, plus trailer, see ‘TOWING 
WEIGHT’, page 221) is towed, ensure that the 
grille and radiator are free from obstruction and 
that only high quality fuel is used. This enables 
the engine and the cooling system to operate 
more efficiently.
NOTE: Above 1,000 ft (300 metres) the effects 
of altitude can adversely affect engine 
performance and also cause overheating.
Correct gear selection will improve vehicle 
performance: On vehicles with manual 
transmission, select the highest practical gear 
that can be maintained without causing the 
engine to labour. On vehicles fitted with 
automatic transmission, select ‘D’ (Drive) and, 
where possible, maintain a speed that 
minimises automatic gear changes.
If severe inclines are encountered when towing 
at high altitude and in a high ambient 
temperature 86°F (30°C) or greater), the 
effective Gross Train Weight will be reduced by 
up to 882 lb (400 kg). Therefore, it may be 
necessary to reduce the vehicle and/or trailer 
weight to help counter the reduced engine 
performance caused by the thinner atmosphere 
experienced at high altitudes. ESSENTIAL TOWING CHECKS
Tire pressures:Increase rear pressures of towing vehicle by at least 3 lbf/in
2 (0.2 bar) up to 
maximum of 46 lbf/in2 (3.2 bar). Ensure that trailer tires are at recommended 
pressures.
Loading:Keep trailer loads securely anchored, evenly distributed and as low as 
possible with heavy loads over the axle. Towing vehicle maximum axle 
weights and gross vehicle weight must not be exceeded.
Tongue weight:Must be minimum of 7% of gross trailer weight up to maximum of 550 lb 
(250 kg) - see vehicle/trailer/tow hitch chart in ‘Technical Data’.
Hitch height:Must be set so that caravan/trailer is level when connected to the tow vehicle 
with engine running. 
						

							Towing
149
Tongue weight
The following operating instructions should be 
read in conjunction with the towing chart given 
later in this section.
WARNING
DO NOT exceed the gross weight or axle loads 
stated on the certification label attached to 
the vehicle. Exceeding allowable vehicle and 
axle loads will increase the risk of tire or 
suspension failure, increase vehicle brake 
stopping distance, and adversely affect 
vehicle handling and stability which may 
result in a crash or rollover.
WARNING
The tongue weight plus the combined weight 
of the vehicles load carrying area and rear 
seat passengers must never exceed the 
specified maximum rear axle load (see 
‘TOWING WEIGHTS’, page 246).
IMPORTANT INFORMATION
For all of the towing conditions described, 
it is important that the following points are 
observed:
•All loads in the vehicle should be 
distributed as far forward as possible.
•The maximum Gross Vehicle Weight 
must not be exceeded, see ‘TOWING 
WEIGHTS’, page 246.
•The maximum individual axle weights 
must not be exceeded, see ‘TOWING 
WEIGHTS’, page 246.
•Changes between high and low range 
should not be made while the vehicle is 
on the move.
•Total trailer weight and tongue load can 
be measured with platform scales 
found at highway weighing stations, 
building supply companies, etc.
•The loading capacities and conditions 
for coil sprung and self levelled vehicles 
are different. Read the following section 
on permitted loading conditions for full 
details.